Relativistic configuration interaction calculations on the Kα x-ray spectra of sulfur

Abstract

The transition energies, transition rates and absorption oscillator strengths of Kα x-ray from S XV to S VIII have been calculated by multiconfiguration Dirac–Fock and relativistic configuration interaction calculation with the inclusion of Breit interaction, quantum electrodynamics and finite nuclear mass corrections in the extended optimal levels scheme. The transition rates have been calculated in Babushkin and length gauges. This work firstly reports the complete Kα x-ray spectra of sulfur, and the results were compared with the available calculative and experimental results on He-like and Li-like sulfur. The corresponding present results are in good agreement with them, and the rest of transitions for the study of the present results are new ones. These wide ranging data can provide useful parameters for the study of the sulfur plasma.